Buttercream Recipe That Crusts Well

I am having a hard time searching for the perfect butter cream recipe that well crust well since I need to do some scroll on it and eventually paint it.I used to buy butter cream from a local bakery but now it's turning out way too expensive. Please help!

Here is the buttercream recipe: (for it to crust let bc stay on cake for about 5-10 mins) 2lbs. powdered sugar (sugar in bags is finer - no sifting)1 cup crisco (white lard, not oil)2 teaspoons stay ice (cuts sweetness)3 tablespoons princess white(cuts greasiness- gives body)1 teaspoon salt1 teaspoon clear vanilla or cream bouquet or butter favoring1/2 cup waterCream together the shortening, stay ice, princess white, salt and flavoring until light and fluffy. Add powdered sugar and water and beat until well blended. Add more water if needed to be softer, a spoonful at a time. Store in airtight container. Wont go bad if sotred properly. I use this recipe everytime.